共查询到16条相似文献,搜索用时 125 毫秒
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以二维扩散模型为基础,采用点源脉冲示踪法对开式浮选柱和装有不同类型规整填料的充填式浮选柱内液相的轴向与径向返混进行了实验研究,得到了各种填料内轴向和径向彼克列准数与气相、液相表观雷诺数的关联式。通过比较发现,在所用填料中,装有250Y或350Y型填料的浮选柱不仅轴向返混最小,而且径向返混最大,最有利于提高回收率。另外,对起泡剂的影响进行了实验研究,发现起泡剂可以减小返混,但当起泡剂浓度大于一定值时反而会增大径向返混。 相似文献
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充填式浮选柱某些参数的相关关系研究 总被引:3,自引:0,他引:3
本文叙述了通过对充填式浮选柱模拟装置的测试,分析探讨了柱内的气泡直径与填料片波纹高度、起泡剂用量、充气量等因素之间的相关关系。 相似文献
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针对利国铁矿铜金选厂铜精矿回收率偏低的生产情况,在借鉴同类矿山成功经验和选矿试验基础上,对该选厂进行了浮选工艺和浮选药剂的技术改造,改造后钢精矿品位提高3.31%,回收率提高5.17%,黄金回收率提高4.15%. 相似文献
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An experimental study on the axial dispersion of liquid was carried out in a 0.382-m-ID flotation column packed with different structured packings or free of packings. The correlations of axial Peclet numbers with the liquid and gas superficial Reynolds numbers were developed for various packings. Among the packings tested, it is found that in the column packed with 250Y or 350Y packings the axial dispersion is the lowest. The addition of frother can decrease the axial dispersion. By the simulation analysis of the one-dimension dispersion model of packed flotation column, it is found that small axial dispersion, high collection rate constant and low axial liquid velocity can increase the collection zone recovery. 相似文献
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气浮工艺及影响净水效果的主要因素探讨 总被引:1,自引:0,他引:1
总结对比了分散空气气浮法、电凝聚气浮法、生物及化学气浮法、溶解空气气浮法和静电喷涂空气法等五种气浮净水工艺的特点及应用范围,重点分析了近年来国内外溶气气浮新工艺的特点,并详尽阐述了影响气浮工艺效果的的各种控制因素。 相似文献
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A method using a cyclonic–static microbubble flotation column packed with fluid guiding media was proposed for improving flotation efficiency of copper sulfide. The installation of packed fluid guiding media in a cyclonic–static microbubble flotation column was for changing flow pattern in 10 the column by avoiding strong cyclonic flow in the upper region of the column, which can cause bubble-particle detachment. Therefore, the attached particles can be more likely to enter the froth zone instead of swirling in the column. The flow rectification contributed to a smaller bubble size in the column and significantly reduced the number of big bubbles with diameter above 1 mm. This scenario was caused by the damping of swirling liquid motion where bubbles tended to 15 concentrate and coalescence in the center of an eddy. The packed fluid guiding media changed the hydrodynamics in the upper column from a cyclonic flow to a gentle flow and as a result improve the column separation. The application of packed fluid guiding media can decrease the bubble-particle detachment and the flotation recovery of copper sulfide could constantly improve with the installation of packed fluid guiding media in the FCSMC column. 相似文献